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<div id="div-1">
 Red
</div>
<div id="div-2">
 <div id="div-2-1">
  Blue
 </div>
</div>
<div aria-hidden="false" id="div-3">
 Indigo
</div>
<div id="div-4">
 Yellow
</div>
<div aria-hidden="true" id="div-5">
 Orange
</div>